Belt-hook press



8- 1939. HANS-JOACHIM ZILLER 2,167,820

BELT -HOOK PRESS- Filed April 1, 1936 5 Sheets-Sheet 1 g- 1, 1939- IHANS-JOYACHIMY'ZILLER 2,167,820

BELT-HOOK PRESS Filed April 1, 1956 3 Sheets-Sheet 2 1, 1939HANS-JOACHIM ZRLLER 2,

BELT-HOOK PRESS Filed April 1, 1936 3 Sheets-Sheet 5 Patented Aug. 1,1939 UNITED STATES PATENT DFFlCE BELT-HOOK PRESS Application April 1,1936, Serial No. 72,155 In Germany March 15, 1935 5 Claims.

The invention relates to belt hook pressers for pressing fastener hooksinto belts, conveyor bands, and the like.

According to the invention, a press including toggle levers is carriedin a frame at an inclination to the base surface thereof, and is adaptedto be moved and fixed on the clip holder for the fastener hooks or upona special guide rod or on both, the toggle levers of the press beingprovided with oscillating pressing jaws. There is also arranged on theframe a clamping device for the belts, conveyor bands, and the like.

Owing to the press being arranged in the frame at an inclination to thebase surface thereof, the introduction of the belt or conveyor band inthe correct position between the jaws is ensured or facilitated. Since,furthermore, the holder for supporting the fastener hooks can be rotatedthrough and can be held secured from radial and axial movement, aneasier insertion of the fastener hooks, as also a better adaptation ofthe hooks to the belt or conveyor band is attained. The latter can alsobe firmh held by a special clamping device provided on the frame, in thecorrect position with respect to the press.

The actual pressing jaws are pivoted and adapted to swing or oscillateon the toggle levers of the press, so that these pressure surfacesautomatically adjust themselves perpendicularly to the direction ofpressure, and automatically take up the most favorable position with thedifferent thicknesses of band, especially as the pivot of theoscillating jaws lies in the direction of the resultant force of theseparate forces acting on the pressing jaws.

According to the invention, the pressing jaws have a special bearing anddesign. The actual pressing jaws are pivoted and adapted to swing oroscillate on the toggle levers of the press, so that their pressuresurfaces automatically adjust themselves perpendicularly to thedirection of the pressure and in the most favorable position with thedifferent thicknesses of band. The pressing jaws, which are adapted toswing outwardly in their longitudinal direction are mounted in themouths of the press levers and have a long outer and short inner limbprojecting beyond the point of oscillation, so that the pressuresurfaces of the oscillating jaws are adjusted automatically during'thepressing process for each size of fastener, either parallel to thesurface of the band or in the most favorable direction resisting thetearing out of the hooks. For this purpose the long outer limb can beprovided at its end, on the pressing side, with a slope falling towardsthe end of the limb. The surfaces of application of the limb jaws can,in order to permit an unrestricted swinging movement be bevelled orundercut.

The improved press is shown by way of example in the accompanyingdrawings, in which: 5

Fig. 1 is a section on the line l-l of Fig. 3.

Fig. 2 is a section on the line 22 of Fig. 3.

Fig. 3 is a plan view of the invention.

Fig. 4 is an enlarged fragmentary section on the line l-| of Fig. 3 andshowing the press jaws fully opened and engaging a belt fastener.

Fig. 5 is a view similar to Fig. 4 but showing the jaws engaging smallerbelt hooks.

Fig. 6 is a view similar to Fig. 4 but showing the jaws closed.

Fig. '7 is a view similar to Fig. 5 but showing the jaws closed.

Fig.8 is a section on the line 88 of Fig. 3.

On the frame l, is fitted a clamping device 2 for the belts, conveyorbands, and the like, in which device the belt or conveyor band end 4which is to be provided with the fastener hooks is clamped in a suitableposition and at an appropriate distance from the holder 3 which carriesthe fastener hooks 5. The press itself including the two toggle levers tand l and the pivot 3, is carried movably on a special guide rod 9 andhook holder 9, these two latter members being carried in the end wallsof the frame. The hook holder 3 is rotatable through 90 in the end wallsof the frame, its rotation being limited by a projection or pin l8fitted on the holder 3 and which runs in an adjusting ring, collar orslot l l in the end wall, the holder 3 being secured against radial andaxial shifting from the determined position, by a clamping screw ll.There are provided on the guide rod 9, notches I3 which, co-operatingwith a ratchet pawl l2, fix the press on the guide rod in the desiredposition. The inclination of the press relative to the base surface isattained by locating the guide rod in the end walls of the frame higherthan the hook holder which also serves as a guide.

The pressing blocks or dies I 4' are mounted and adapted to pivot in thelongitudinal direction of the press limbs, in the jaws l8 of the limbs65, 1'. Each pressing block or die is pivoted in a jaw it in such amanner that it presents a longer outer limb l9 projecting beyond itspoint of oscillation Hi and a shorter limb 20. 50 On the pressure side,the outer limb l9 has at its end a short bevel 2i facing towards the endof the limb. The surfaces of application 22 of the limb jaws it in whichthe blocks oscillate can also be bevelled or undercut. The pressuretrans- 55 mitted to the pressing blocks by the concerted movement of thepress limbs 6, 1 acts in a uniform manner on the fastener hooks whetherthe latter are large or small. Since the blocks [4 in the jaws l8 of thelimbs 6, I can oscillate somewhat, they fit themselves in anadvantageous manner to the pressure surface when the connecting hooksare pressed together. It does not matter whether the connecting hook issmall or large. Figures 4 and 5 show the effect when connecting hooks ofvarious sizes are used. The large hooks of Fig. 4 cause an outwardopening of the oscillating blocks I4, while the latter open inwardlywhen smaller hooks are used, as shown in Fig. 5. Figs. 6 and 7 show thehooks of Figs. 4 and 5 after they have been pressed into belt 4. It canbe seen that in both instances, the blocks M are not in contact with thestriking faces 22 but have a flat contact with the pressure surfaces.Because of the bevels 2| on the longer ends of the limbs IQ of theblocks l4, these parts do not touch the belt so that the pressure effectof the blocks can be effective only in the area of the connecting hooks.

I claim:

1. In a belt hook press, a frame having a transverse guide member, abelt clamp carried by the forward part of said frame parallel to saidguide member, a belt hook holder carried by the frame between said guidemember and belt clamp and parallel thereto, a belt hook press slidablymounted on said guide member to move parallel to the belt hook holder,said press including jaws and presser blocks carried thereby andextending forwardly'of the belt hook holder, and means for selectivelypositioning said press on the guide member.

2. In a belt hook press, a frame having a transverse guide member, abelt clamp carried by the forward part of said frame parallel to saidguide member, a belt hook holder carried by the frame between said guidemember and belt clamp and parallel thereto, a belt hook press slidablymounted onsaid guide member to move parallel to the belt hook holder,said press including jaws and presser blocks carried thereby andextending forwardly of the belt hook holder, said guide member beingprovided with a series of notches spaced longitudinally of the member,and a pawl pivoted to the press and engageable selectively in saidnotches.

3. In a belt hook press, a frame having a transverse guide member, afelt clamp carried by the forward part of said frame parallel to saidguide member, a belt hook holder carried by the frame between said guidemember and belt clamp and parallel thereto, a belt hook press slidablymounted on said guide member to move parallel to the belt hook holder,said press including jaws and presser blocks carried thereby andextending forwardly of the belt hook holder, means for selectivelypositioning said press on the guide member, and guide means on saidpress engaging said hook holder to prevent tilting of the press on saidguide member.

4. In a belt hook press, a frame having a transverse guide member, abelt clamp carried by the forward part of said frame parallel to saidguide member, a belt hook holder carried by the frame between said guidemember and belt clamp and parallel thereto, a belt hook press slidablymounted on said guide member to move parallel to the belt hook holder,said press including jaws and presser blocks carried thereby andextending forwardly of the belt hook holder, said guide member beingprovided with a series of notches spaced longitudinally of the member, apawl pivoted to the press and engageable selectively in said notches,and guide means on said press engaging said hook holder to preventtilting of the press on said guide member.

5. In a belt hook press, a support, a pair of pivotally mounted jawsslidably mounted on said support for transverse movement with respect toa belt, presser blocks each pivotally connected to a respective jaw toswing on an axis extending transverse said jaw, and means carried bysaid support for securing an end of said belt thereto in a position forthe attachment of belt hooks thereto.

HANS-JOACHIM ZILLER.

